Of course, no one ever plans on being in an accident, or falling sick with a serious illness. But these things do happen and it's important to designate a power of attorney (or health care agent) in case they do. This agent can then speak for you and make health care decisions for you in the event you are unable. The link above will take you to a power of attorney form from the Department of Public Health. There you can find more information about designating a health care agent and what decisions they can make on your behalf.